This article was posted to the Usenet group alt.hackers in
1995; any technical information is probably outdated.
Parent
Re: Boolean Grep?
Article: 7803 of alt.hackers Newsgroups: alt.hackers From: king@cs.wcu.edu (mark benedetto king) Subject: Re: Boolean Grep? X-Nntp-Posting-Host: tinuviel.cs.wcu.edu Message-ID: D8Fq1G.76G@ecsvax.uncecs.edu Sender: usenet@ecsvax.uncecs.edu (News Administrator) Organization: UNC Educational Computing Service Date: Thu, 11 May 1995 22:20:04 GMT Approved: king@tinuviel.cs.wcu.edu Lines: 18 Status: RO
chrisbib@umd.umich.edu (Christopher Bibbs) writes: >Ok, I've been working on this for awhile and no one seems to be able to >figure it out so I'll put it out here. I'm trying to get grep or a grep >like function to return a true-false to be used in a script. Before you >say use perl I should say that the point of this is expressly NOT to use >perl. Basically, I'm grepping some inputs and if true the script >responds with (you guessed it) True. We don't want to see the line(s) that >triggered the true or the file name(s) just the line true. If anyone has >a clue, I'd love to hear it. ---- #!/bin/bash if test -z "`grep $*`"; then echo Yes; else echo No; fi ----- use it just like grep. and man bash.
Parent